Forty Centuries of Ink / Or, A chronological narrative concerning ink and its backgrounds, introducing incidental observations and deductions, parallels of time and color phenomena, bibliography, chemistry, poetical effusions, citations, anecdotes and curiosa together with some evidence respecting the evanescent character of most inks of to-day and an epitome of chemico-legal ink.

by David Nunes Carvalho

If you write with the juice of Citrons, Oranges, Onyons, or almost any sharp things, if you make it hot at the fire, their acrimony is presently discovered: for they are undigested juices, whereas they are detected by the heat of the fire, and then they show forth those colours that they would show if they were ripe. If you write with a sowre Grape that would be black, or with Cervices; when you hold them to the fire they are concocted, and will give the same colour they would in due time give upon the tree, when they were ripe. Juice of Cherries, added to Calamus, will make a green: to sow- bread a red: so divers juices of Fruits will show divers colours by the fire. By these means Maids sending and receiving love-letters, escape from those that have charge of them. There is also a kind of Salt called Ammoniac: this powdered and mingled with water, will write white letters, and can hardly be distinguished from the paper, but hold them to the fire, and they will shew black."

With respect to the preparation of black and colored inks and also colors: Antonio Neri, an Italian author and chemist who lived in the sixteenth century, in his treatise seems not only to have laid the foundation for most of the receipts called attention to by later writers during the two hundred years which followed, but to have been the very first to specify a proper "gall" ink and its formula, as the most worthy of notice.

Pietro Caneparius, a physician and writer of Venice, A. D. 1612, in his work De Atrametis, gives a more extensive view about the preparation and composition of inks and adopts all that Neri had given, though he never quotes his name, and adds—"hitherto published by no one." He does however mention many valuable particulars which were omitted by Neri. Most of his receipts are about gold, silver and nondescript inks, with directions for making a great variety for secret writing and defacing. This book revised and enlarged was republished in London, 1660.

In 1653 Peter Borel, who was physician to Louis XIV, King, of France published his "Bibliotheca Chemica," which contains a large number of ink receipts, two of which may be characterized as "iron and gall" ones. They possess value on account of the relative proportions indicated between the two chemicals. The colored ones, including gold, silver and sympathetic inks are mostly repetitions of those of Neri and Caneparius. The French writers, though, speak of his researches in chemistry as "somewhat credulous."

Christopher Merret, an English physician and naturalist, born A. D. 1614, translated Neri into our language in 1654, with many notes of his own about him; his observations have added nothing of value to the chemistry of inks.

Johann Kunckel, a noted German chemist and writer in 1657, republished in the German language Neri's work with Merret's notes, and his own observations on both. He also inserted many other processes as the result of considerable research and seems to have been thoroughly conversant with the chemistry of inks, advocating especially the value and employment of a tanno-gallate of iron ink for record purposes.

Salmon, A. D. 1665, in his Polygraphics, proceeds to give instructions relative to inks which notwithstanding their merit are confounded with so many absurdities as to lessen their value for those who were unable to separate truth from falsehood; but he nevertheless dwells on the virtues of the "gall" inks.

Jacques Lemort, a Dutch chemist of some note, issued a treatise, A. D. 1669, on "Ink Formulas and Colors," seemingly selected from the books of those who had preceded him. He expresses the opinion that the "gall" inks if properly compounded would give beneficial results.

Formulas for making inks are found tucked away in some of the very old literature treating of "curious" things. One of them which appeared in 1669 directs: "to strain out the best quality of iron employ old and rusty nails;" another one says, that the ink when made is to remain in an open vessel "for thirty days and thirty nights, before putting it in a parchment bag."

An English compendium of ink formulas, published in 1693, calls attention to many formulas for black inks as well as gold, silver, and the colored ones; no comment, however, is made in respect to any particular one being better than another as to permanency, and these conditions would seem to have continued for nearly a century later, though the art of handwriting was making giant strides.